-- @testpoint: opengauss关键字declare(非保留)，作为函数名，部分测试点合理报错

--关键字不带引号-成功
drop function if exists declare;
create function declare(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function if exists declare;
--关键字带双引号-成功
drop function if exists "declare";
create function "declare"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function if exists "declare";
--关键字带单引号-合理报错
drop function if exists 'declare';
create function 'declare'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `declare`;
create function `declare`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/